Directly target WebAssembly

LLVM Frontend

• Target LLVM Intermediate Representation

Binaryen

• Also with an OCaml binding

AssemblyScript

• targets WebAssembly while utilizing TypeScript's syntax and node's vibrant ecosystem.
• Run by npm or via browser

Jankscripten

• Target one of the intermediate languages used by Jankyscripten:
  • (Variant of) JavaScript: (Chain existing JS compiler in Links)
  • JankyScript
  • NotWasm

Still to explore

• Awesome WebAssembly Languages
• Duktape - an embeddable Javascript engine, with a focus on portability and compact footprint that's capable of being run in the browser via WebAssembly.